Gearing.



No. 795,499. PATENTED JULY 25, 1905.

E. EVANS & W. A, GERNER.

GEARING.

APPLICATION FILED 00127, 1904.

2 SHEETSSH'EET 1.

PATENTED JULY 25, 1905.

E. EVANS & W. A. GERN GEARING.

- APPLICATION FILED OGT. 27, 1904.

2 SHEETS-SHEET 2.

ENVENTULQ5 UNITED STATES PATENT OFFTOE.

EVAN EVANS AND WILSON A. GERNER, OF BUTLER, PENNSYLVANIA, ASSIGNORS TO THE EVANS MANUFACTURING COMPANY, LIMITED, OF BOROUGH OF BUTLER, PENNSYL VANIA.

GEARING.

Specification of Letters'Patent. v

Patented July 25, 1905.

Application filed October 27, 1904. SeriaLNo. 230,187.

To aZZ whom it may concern:

Be it known that we,'EvAN EVANS and VVIL- soN A. GERNER, citizens of the United States, residing at Butler, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Gearing, of

- which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to mechanism for imparting rotary motion to a belt-pulley or other rotating body in reverse directions without regard to the direction of rotation of the driveshaft, and the general purpose of the invention is to simplify, improve, and render more efiicient this type of apparatus.

A further purpose is to improve the internal gearing and other structural features of the clutch-pulley mechanism.

The invention consists in the novel features of construction and combination and arrangement of parts, hereinafter fully described and claimed, and illustrated by the accompanying drawings, wherein- Figure 1 is a longitudinal sectional view of the improved mechanism. Figs. 2 and 3 are opposite end views of the same. Figs. 4, 5, and 6 are detail views of the roller-chain gears. Fig. 7 illustrates a slight modification in the form of chain-roller.

Referring to the drawings, 2 designates an engine or other drive-shaft, and permanently secured thereto is the driving-gear of the clutch mechanism. The driving-gear is here shown embodied in an annular head or body 3, carried at one end of an elongated hub 4, the latter being keyed to the shaft, and detachably secured to the body 3 is the toothed gear-ring 5, which is so arranged that the teeth project from the-inner face of the drive-.

gear. This construction is preferable to forming the teeth integral with the gear-body, for if a tooth is broken it is only necessary to replace the gear-ring. I

A belt-pulley 6 is rotatably mounted on hub 4, preferably on a roller-bearing 7, and detachably secured to one end of the pulley is the gear-ring 8, which is of the same size as ring and faces the same. In thepresent embodiment of the invention pulley 6 and ring 8 constitute the driven gear. At the inner end of hub 4 is head 9, and slidable thereon are the radially-arranged clutch-shoes 10, which are adapted to engage the end of the pulley opposite gear-rin 8 and cause the pulley to rotate with the 31m. Shoes 10 are connected by links 11 with sleeve 12, slidable on shaft 2.

A circular carrier 13 is loosely mounted on hub 4 between the driving and driven gears and is formed with the V-shaped periphery 13 toreceive shoes 14 on brake-band 14. The carrier is formed with openings 15, which are intersected by the radial pin-cavities 16, the latter opening through the carrier periphery and removably confining journal pins 17. Mounted on each of these pins in opening 15 is roller 18, formed with a circumferential depression 19, and confined in this depression is the chain-gear 20, having rollers 21 on the pivot-pins 21 thereof. The roller-chain gears or pinions mesh with and thus operatively connect the driving and driven gears. Rollers 18 turn on pins 17, and chains 20 may turn on or with rollers 18, as may be preferred. Chainrollers 21 may be straight or cylindrical or they may be tapered, as shown at 32, Fig. 7, to conform to the converging side faces of the gear-teeth meshing therewith.

A rock-shaft 22 parallels drive-shaft 2, being mounted in suitable bearings or brackets 23 and 24 and having at one end crank 25, which is connected by link 26 with arm 27 of the rock-shaft 28, the latter being mounted in extension 24 of bearing or bracket 24. Carried by shaft 28 is the yoke 29 for mov- "ing the clutch-operating sleeve 12. Secured to the opposite end of shaft 22 is leverBO, to which the extremities ofbrztke-band 14 are connected, as shown, so that movement of the lever in one direction so tightens the brake as to hold carrier 13 fixed and at the same time, through the medium of the described intermediate connections, retracts clutch-shoes 10. Thus with carrier 13 held fixed and pulley 6 free to rotate independently of the shaft the power is transmitted through chain-gears 20, and pulley 6 is caused to rotate in direction opposite to that of the driving-gear and shaft 2. An opposite move ment-of lever 30 releases the brake-band and at the same time moves outward clutchshoes 10, thus positively securing pulley 6 to shaft 2 and causing said parts to turn together. At such time carrier 13'is free to turn with the drive-shaft, so that all parts turn or rotate together with the latter.

There is comparatively little friction between roller-chain gears and driving and driven gears, and the operation is practically noiseiess. Furthermore, the appreciable elastioity of the chain-pinions renders them more durable than solid-toothed pinions heretofore used, and danger of stripping the teeth of the driving and driven gears is practically eliminated. The detachable gear-rings which form the toothed elements of the driving and driven gears may be readily removed and replacedwhen teeth are brolren, thus making it un necessary to renew any other part.

it will be understood that the driven element may include a belt-pulley, as here shown, or any other form of gearing or rotating body that it may be desired to drive. The inverttion may be changed or modified in various other Ways without departing from the spirit and scope thereof as defined by the appended claims.

We claim 1. An improved gear-wheel comprising a support having a eontinuously-curved enterior surface, and an endless sprocket-chain extending around and having a continuous bearing against said surface. 2. An improved gear-wheel comprising circular support, and an endless sprocket- ,chain encircling and having a continuous driven ehaiirgears between and dosh- Ling W1" the driving and driven and "means. supporting the cha irsin Em position. between the driving and driven The combination a driving-gear, a

7 n means for rigidly connecti' "the dri ing and driven gears, ch i ne--- tween and meshing with th and w or the chaindriven gears, movable supp said support gears, and means for holdiig imnfiovable,

The combination of a driving 'ven chain-gears between and connect the driving and driven gears, a movable 'er for the chain-gears, and means open iti alternately to rigidly connect the driv ing and driven gears and to hold the chain* gear carrier aga nst rotation,

The combination of drivin and capable of independent rote r .mmon axis 1 Gil.

-v' v i l and an. mg sepai ateo ing gear-faces projecting in directions parallel with said axis, chain-gears between and at opposite sides meshing with the driving and driven gears, a movable carrier for the chaingears, means for holding the carrier immovable, and means for rigidly uniting the driving and driven gears.

9. The combination of a shaft, a driving gear secured thereto, a driven gear looseon the shaft, clutch mechanism for securing the driven gear to the shaft, a carrier loose on the shaft between the driving and driven gears, chain-gears rotatably mounted in the carrier between and meshing with the driving and driven" gears, and means for holding the carrier against rotation. a

10. The combination of a shaft, a drivinggear secured thereto, driven gear loose on the shaft, clutch mechanism for securing the driven gear to the shaft, a carrier loose on the shaft between said gears, rollers mounted in the carrier, chain-gearsencircling the rollersand meshing with the driving and driven gears, and means for holding the carrier against rotation.

11. The combination of a shaft, a drivinggear secured thereto, a driven gear loose on the shaft, clutch mechanism for securing the driven gear to the shaft, a carrier loose on the shaft between said gears, radially-arranged hearings in the carrier, rollers mounted on the bearings, chain-gears encircling, the rollers and messing with the driving and driven gears, and means for holding the carrier against rotation.

12, The combination of a shaft, a driving element sect red thereto, a toothed ring do tachably secured to the driving element, a d. en element loose on the shaft, a toothed detachabiy secured to the driven element and facing the corresponding ring of the driv element, clutch mechanism securing the driven e ement to the sh: t a carrier loose on the shaft between the drivi el ments, gears rotatably mounts .er and meshing with said toothet r" igs,

for holding the against rotation.

13, The combination of shot, a o ivingenelongatcd hub secured to the shaft, criven rotaably moi on the hub, crutch mechanism o ier ioose o :s, mounted i the drivii and means for hoiding let. The combination of a shaft, a dri gear secured thereto, pulley ioose shaft, clutch mechan sm rota able shaft and adapted to end pulley, a y secured to the opoositeendo A he driv li the driving- 'ear and mounted the carrier and mes t y. or loose on t driving-gear and gear-ring, and means for holding the carrier against rotation. I

15. The combination of a shaft, a drivinggear secured thereto, a driven gear loose on the shaft, clutch mechanism for securing the driven gear to the shaft, a-carrier loose on the shaft between said gears, gears mounted in the carrier and meshing with the driving and driven gears, a brake-band for the carrier, and a rock-shaft operatively connected to the brake-band and the clutch mechanism, the connehtions between said parts being so constructed and arranged that movement of the rock-shaft in one direction tightens the brakeband and releases the clutch mechanism while opposite moveinent of the rock-shaft releases the brake-band and engages the clutch mech anism.

In testimony whereof we aflix our signatures in presence of two witnesses.

EVAN EVANS. W. GERNER.

Witnesses:

SYLvEsTER F. Bowsnn, S. F. LETSHAW. 

